Devils Line Wiki
Yuuko Tamaru
Kanji 田丸 裕子
Romaji Tamaru Yūko
Alias Yuuko Yano (矢野 裕子, Yano Yūko?) (Maiden name)
Biological Information
Species Devil
Gender Female
Unique Features Glasses
Biographical Information
Status Alive
Relationship Status Married
Relatives Makoto Tamaru (Husband)
Other Relations
Affiliation Tsukii Storage
Occupation Part-time inspector
Hometown ONLO orphanage, Hokkaido
Manga Debut Line 2; Safe House
Anime Debut Episode 2, Safe House

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Yuuko Tamaru (田丸 裕子, Tamaru Yūko?), née Yano (矢野?) is a childhood friend of Yuuki Anzai who grew up with him in the same ONLO orphanage where she used to have a bit of a crush on him, but after graduating from ONLO, she fell in love with and married a human named Makoto Tamaru.


At a young age, Yuuko was placed the ONLO orphanage because of economic crises at home. Although her parents were healthy, they couldn't afford to care for Yuuko and therefore left her at the orphanage. Yuuko became great friends with Yuuki and Tadaya Hiruta and the three would often play together. After she graduated from ONLO, she married Makoto Tamaru and began working part-time as an inspector in the Tsukii Storage.


Yuuko is a petite woman with a slim build noted to be beautiful. She has medium-colored eyes that she wears oval-shaped glasses over, and she has dark circles under her eyes due to being a devil. Her shoulder-length hair is straight and her bangs middle parted; with two strands of hair framing her face.


Like any other devil, Yuuko will transform into a devil at the sight of blood. Her eyes will start to turn red, her irises will turn yellow and veins will appear around her eyes. Her teeth will sharpen into fangs and her nails will turn into claws.


Yuuko Devil
Yuuko in her transformed state.
Chapter 50
Yuuko with her childhood friends as children.


Yuuko has always been a very kind woman, and as a child she was quite meek and shy. She is also quiet and sensitive, and due to her gentleness, she was able to get married despite being a devil. But is stated that, despite her gentle nature, it didn't make her "any less of a devil". She loves her husband dearly, which is why she was very self-conscious about the fact that she was a devil and tried her best not to let him get hurt. She showed great guilt and sadness for hurting her husband.


Yuuko and Makoto had been living together for awhile. But after he accidentally cut his finger one day while cooking, he asked her if she wanted to take a lick. After seeing his blood, Yuuko lost control of herself and accidently drank his blood and stabbed him. After she had come to her senses, she was horrified and fled from her home, but she was later chased down by Division 5 of the Public Safety Department. She was confronted by her childhood friend Yuuki of her actions, to which Yuuko told him about how scared she was that her husband would come to dislike her, but Yuuki scolded her for not explaining the true horrors of being a devil to her husband. Yuuko was later arrested for assault, but her husband forgave Yuuko and showed great concern for her. He promised that he would be more careful in the future.


  • The name Yuuko means "abundant" (裕) (yuu) and "child" (子) (ko).
  • Yuuko's surname Tamaru means "field, rice paddy" (田) (ta) and "round, circle, pills, purity, suffix for ship names, complete" (丸) (maru).
    • Her maiden name Yano means "arrow" (矢) (ya) and "field, wilderness" (野) (no).


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Characters of the Devils Line Series
Main Cast
Yuuki AnzaiTsukasa TairaJohannes KleemanAkio KanoJuliana LloydTakashi SawazakiToshiro SakakiRyusei Yanagi

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Keio University
Teachers Keiji Ochiai
Students Miwako TodaShouta AkimuraTsukasa Taira
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MPD Public Safety
F Squad Juliana LloydMegumi IshimaruRyusei YanagiTakashi SawazakiYousuke AsamiYuuki Anzai
A Squad Kirio KikuharaYoshiyuki Uno
B Squad Takeshi Makimura
C Squad Masakazu TakimotoNaoya UshioYuu Kagasaki
Others Aya ShinjoKaname Yukimori Kenichi Morisawa Shizuka MachidaTadaya Hiruta

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Active Members Kaname ShiraseKirio KikuharaAkihito KanzakiYuriko Hyuga
Former members Kenichi YoshiiKouhei Nakamura Mayu SumimoriMegumi IshimaruNanako TenjoNaoya UshioRen Murakami Takeshi Makimura

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Research Haruto MinegishiJulius KurtzMasami KomatsuIbuki Takeya Maiko Hashimoto Midori AnzaiMikaze Akimura Shouta AkimuraTamaki Anzai
ONLO Johannes KleemanTadaya HirutaYuuki AnzaiYuuko TamaruKubo
R2PC Kaname ShiraseSusumu Sofue

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Other Characters
Civillians Akio KanoEkaKaori SumimoriKatsuki SumimoriKousuke ChizuMakoto TamaruMana SumimoriMio SumimoriMiho Kaneda Misaki TakenamiSaki SumimoriSayuri Tenjo Shizuku Takenami Toshiro SakakiYasuhiko TakeyaYuzuru Kikuhara
Bar Cross Minami Okino
Bar CALM Kiwako Oe Ryunosuke KatagiriWataru Akase
Meteorology Plus Yuichi UtsumiYuriko Hyuga
Asahi Railways S.S TamiyaYousuke NakamuraYoriko Narumi
Shirase Hospital Akihito KanzakiFeng Jing